Find the area of the circle pictured. Use A = 3.14r ^2

A. A = 12.56n^2 - 37.68n + 28.26
B. A = 12.56n^2 + 28.26
C. A = 6.28n^2 - 9.24

Question

Find the area of the circle pictured. Use A = 3.14r ^2

        A.	A = 12.56n^2 - 37.68n + 28.26
	B.	A = 12.56n^2 + 28.26
	C.	A = 6.28n^2 - 9.24

anonymous · Answer

anonymous · Answer

what was r?  

plug it into the formula.  I know you can do this :)

anonymous · Answer

r is 2n-3

anonymous · Answer

ok plug it in

anonymous · Answer

okay so the formula would be A= 3.14(2n-3)^2?

anonymous · Answer

okay when I did the formula I got a answer tht's not in the choices.

anonymous · Answer

yes that is correct.  you must factor out now

3.14 [(2n-3)(2n-3)]

anonymous · Answer

So will the answer be A?

anonymous · Answer

yes

anonymous · Answer

Yes!! thnk u so much for ur help. n dnow i understand how to figure out problems like theese.